Merge branch 'js/larger-timestamps'

Portability fix.

* js/larger-timestamps:
  commit: use timestamp_t for author_date_slab

commit.c

@@ -656,7 +656,7 @@ struct commit *pop_commit(struct commit_list **stack)
 define_commit_slab(indegree_slab, int);
 /* record author-date for each commit object */
-define_commit_slab(author_date_slab, unsigned long);
+define_commit_slab(author_date_slab, timestamp_t);
 static void record_author_date(struct author_date_slab *author_date,
 			       struct commit *commit)